source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p7-auth-22-from-21.diff.html @ 2650

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37  <table border="0" cellpadding="0" cellspacing="0">
38  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p7-auth-21.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p7-auth-22.txt&nbsp;</th><th></th></tr>
39      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
40      <tr><td class="lineno" valign="top"></td><td class="left">HTTPbis Working Group                                   R. Fielding, Ed.</td><td> </td><td class="right">HTTPbis Working Group                                   R. Fielding, Ed.</td><td class="lineno" valign="top"></td></tr>
41      <tr><td class="lineno" valign="top"></td><td class="left">Internet-Draft                                                     Adobe</td><td> </td><td class="right">Internet-Draft                                                     Adobe</td><td class="lineno" valign="top"></td></tr>
42      <tr><td class="lineno" valign="top"></td><td class="left">Obsoletes: 2616 (if approved)                            J. Reschke, Ed.</td><td> </td><td class="right">Obsoletes: 2616 (if approved)                            J. Reschke, Ed.</td><td class="lineno" valign="top"></td></tr>
43      <tr><td class="lineno" valign="top"></td><td class="left">Updates: 2617 (if approved)                                   greenbytes</td><td> </td><td class="right">Updates: 2617 (if approved)                                   greenbytes</td><td class="lineno" valign="top"></td></tr>
44      <tr><td><a name="diff0001" /></td></tr>
45      <tr><td class="lineno" valign="top"></td><td class="lblock">Intended status: Standards Track                         <span class="delete">October 4, 2012</span></td><td> </td><td class="rblock">Intended status: Standards Track                       <span class="insert">February 23, 2013</span></td><td class="lineno" valign="top"></td></tr>
46      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">April 7,</span> 2013</td><td> </td><td class="rblock">Expires: <span class="insert">August 27,</span> 2013</td><td class="lineno" valign="top"></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
48      <tr><td class="lineno" valign="top"></td><td class="left">         Hypertext Transfer Protocol (HTTP/1.1): Authentication</td><td> </td><td class="right">         Hypertext Transfer Protocol (HTTP/1.1): Authentication</td><td class="lineno" valign="top"></td></tr>
49      <tr><td><a name="diff0002" /></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="lblock">                     draft-ietf-httpbis-p7-auth-2<span class="delete">1</span></td><td> </td><td class="rblock">                     draft-ietf-httpbis-p7-auth-2<span class="insert">2</span></td><td class="lineno" valign="top"></td></tr>
51      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
52      <tr><td class="lineno" valign="top"></td><td class="left">Abstract</td><td> </td><td class="right">Abstract</td><td class="lineno" valign="top"></td></tr>
53      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
54      <tr><td class="lineno" valign="top"></td><td class="left">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td> </td><td class="right">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td class="lineno" valign="top"></td></tr>
55      <tr><td class="lineno" valign="top"></td><td class="left">   protocol for distributed, collaborative, hypermedia information</td><td> </td><td class="right">   protocol for distributed, collaborative, hypermedia information</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">   systems.  This document defines the HTTP Authentication framework.</td><td> </td><td class="right">   systems.  This document defines the HTTP Authentication framework.</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">Editorial Note (To be removed by RFC Editor)</td><td> </td><td class="right">Editorial Note (To be removed by RFC Editor)</td><td class="lineno" valign="top"></td></tr>
59      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
60      <tr><td class="lineno" valign="top"></td><td class="left">   Discussion of this draft takes place on the HTTPBIS working group</td><td> </td><td class="right">   Discussion of this draft takes place on the HTTPBIS working group</td><td class="lineno" valign="top"></td></tr>
61      <tr><td class="lineno" valign="top"></td><td class="left">   mailing list (ietf-http-wg@w3.org), which is archived at</td><td> </td><td class="right">   mailing list (ietf-http-wg@w3.org), which is archived at</td><td class="lineno" valign="top"></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://lists.w3.org/Archives/Public/ietf-http-wg/&gt;.</td><td> </td><td class="right">   &lt;http://lists.w3.org/Archives/Public/ietf-http-wg/&gt;.</td><td class="lineno" valign="top"></td></tr>
63      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="left">   The current issues list is at</td><td> </td><td class="right">   The current issues list is at</td><td class="lineno" valign="top"></td></tr>
65      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://tools.ietf.org/wg/httpbis/trac/report/3&gt; and related</td><td> </td><td class="right">   &lt;http://tools.ietf.org/wg/httpbis/trac/report/3&gt; and related</td><td class="lineno" valign="top"></td></tr>
66      <tr><td class="lineno" valign="top"></td><td class="left">   documents (including fancy diffs) can be found at</td><td> </td><td class="right">   documents (including fancy diffs) can be found at</td><td class="lineno" valign="top"></td></tr>
67      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td> </td><td class="right">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td class="lineno" valign="top"></td></tr>
68      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
69      <tr><td><a name="diff0003" /></td></tr>
70      <tr><td class="lineno" valign="top"></td><td class="lblock">   The changes in this draft are summarized in Appendix D.<span class="delete">2</span>.</td><td> </td><td class="rblock">   The changes in this draft are summarized in Appendix D.<span class="insert">3</span>.</td><td class="lineno" valign="top"></td></tr>
71      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
72      <tr><td class="lineno" valign="top"></td><td class="left">Status of This Memo</td><td> </td><td class="right">Status of This Memo</td><td class="lineno" valign="top"></td></tr>
73      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="left">   This Internet-Draft is submitted in full conformance with the</td><td> </td><td class="right">   This Internet-Draft is submitted in full conformance with the</td><td class="lineno" valign="top"></td></tr>
75      <tr><td class="lineno" valign="top"></td><td class="left">   provisions of BCP 78 and BCP 79.</td><td> </td><td class="right">   provisions of BCP 78 and BCP 79.</td><td class="lineno" valign="top"></td></tr>
76      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
77      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are working documents of the Internet Engineering</td><td> </td><td class="right">   Internet-Drafts are working documents of the Internet Engineering</td><td class="lineno" valign="top"></td></tr>
78      <tr><td class="lineno" valign="top"></td><td class="left">   Task Force (IETF).  Note that other groups may also distribute</td><td> </td><td class="right">   Task Force (IETF).  Note that other groups may also distribute</td><td class="lineno" valign="top"></td></tr>
79      <tr><td class="lineno" valign="top"></td><td class="left">   working documents as Internet-Drafts.  The list of current Internet-</td><td> </td><td class="right">   working documents as Internet-Drafts.  The list of current Internet-</td><td class="lineno" valign="top"></td></tr>
80      <tr><td class="lineno" valign="top"></td><td class="left">   Drafts is at http://datatracker.ietf.org/drafts/current/.</td><td> </td><td class="right">   Drafts is at http://datatracker.ietf.org/drafts/current/.</td><td class="lineno" valign="top"></td></tr>
81      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
82      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are draft documents valid for a maximum of six months</td><td> </td><td class="right">   Internet-Drafts are draft documents valid for a maximum of six months</td><td class="lineno" valign="top"></td></tr>
83      <tr><td class="lineno" valign="top"></td><td class="left">   and may be updated, replaced, or obsoleted by other documents at any</td><td> </td><td class="right">   and may be updated, replaced, or obsoleted by other documents at any</td><td class="lineno" valign="top"></td></tr>
84      <tr><td class="lineno" valign="top"></td><td class="left">   time.  It is inappropriate to use Internet-Drafts as reference</td><td> </td><td class="right">   time.  It is inappropriate to use Internet-Drafts as reference</td><td class="lineno" valign="top"></td></tr>
85      <tr><td class="lineno" valign="top"></td><td class="left">   material or to cite them other than as "work in progress."</td><td> </td><td class="right">   material or to cite them other than as "work in progress."</td><td class="lineno" valign="top"></td></tr>
86      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
87      <tr><td><a name="diff0004" /></td></tr>
88      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on A<span class="delete">pril </span>7, 2013.</td><td> </td><td class="rblock">   This Internet-Draft will expire on A<span class="insert">ugust 2</span>7, 2013.</td><td class="lineno" valign="top"></td></tr>
89      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="left">Copyright Notice</td><td> </td><td class="right">Copyright Notice</td><td class="lineno" valign="top"></td></tr>
91      <tr><td><a name="diff0005" /></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="lblock">   Copyright (c) 201<span class="delete">2</span> IETF Trust and the persons identified as the</td><td> </td><td class="rblock">   Copyright (c) 201<span class="insert">3</span> IETF Trust and the persons identified as the</td><td class="lineno" valign="top"></td></tr>
93      <tr><td class="lineno" valign="top"></td><td class="left">   document authors.  All rights reserved.</td><td> </td><td class="right">   document authors.  All rights reserved.</td><td class="lineno" valign="top"></td></tr>
94      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
95      <tr><td class="lineno" valign="top"></td><td class="left">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td> </td><td class="right">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td class="lineno" valign="top"></td></tr>
96      <tr><td class="lineno" valign="top"></td><td class="left">   Provisions Relating to IETF Documents</td><td> </td><td class="right">   Provisions Relating to IETF Documents</td><td class="lineno" valign="top"></td></tr>
97      <tr><td class="lineno" valign="top"></td><td class="left">   (http://trustee.ietf.org/license-info) in effect on the date of</td><td> </td><td class="right">   (http://trustee.ietf.org/license-info) in effect on the date of</td><td class="lineno" valign="top"></td></tr>
98      <tr><td class="lineno" valign="top"></td><td class="left">   publication of this document.  Please review these documents</td><td> </td><td class="right">   publication of this document.  Please review these documents</td><td class="lineno" valign="top"></td></tr>
99      <tr><td class="lineno" valign="top"></td><td class="left">   carefully, as they describe your rights and restrictions with respect</td><td> </td><td class="right">   carefully, as they describe your rights and restrictions with respect</td><td class="lineno" valign="top"></td></tr>
100      <tr><td class="lineno" valign="top"></td><td class="left">   to this document.  Code Components extracted from this document must</td><td> </td><td class="right">   to this document.  Code Components extracted from this document must</td><td class="lineno" valign="top"></td></tr>
101      <tr><td class="lineno" valign="top"></td><td class="left">   include Simplified BSD License text as described in Section 4.e of</td><td> </td><td class="right">   include Simplified BSD License text as described in Section 4.e of</td><td class="lineno" valign="top"></td></tr>
102      <tr><td class="lineno" valign="top"></td><td class="left">   the Trust Legal Provisions and are provided without warranty as</td><td> </td><td class="right">   the Trust Legal Provisions and are provided without warranty as</td><td class="lineno" valign="top"></td></tr>
103      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
104      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 3, line 22</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 3, line 22</em></th><td></td></tr>
105      <tr><td class="lineno" valign="top"></td><td class="left">     2.2.  Protection Space (Realm) . . . . . . . . . . . . . . . . .  6</td><td> </td><td class="right">     2.2.  Protection Space (Realm) . . . . . . . . . . . . . . . . .  6</td><td class="lineno" valign="top"></td></tr>
106      <tr><td class="lineno" valign="top"></td><td class="left">     2.3.  Authentication Scheme Registry . . . . . . . . . . . . . .  7</td><td> </td><td class="right">     2.3.  Authentication Scheme Registry . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
107      <tr><td class="lineno" valign="top"></td><td class="left">       2.3.1.  Considerations for New Authentication Schemes  . . . .  7</td><td> </td><td class="right">       2.3.1.  Considerations for New Authentication Schemes  . . . .  7</td><td class="lineno" valign="top"></td></tr>
108      <tr><td class="lineno" valign="top"></td><td class="left">   3.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  9</td><td> </td><td class="right">   3.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  9</td><td class="lineno" valign="top"></td></tr>
109      <tr><td class="lineno" valign="top"></td><td class="left">     3.1.  401 Unauthorized . . . . . . . . . . . . . . . . . . . . .  9</td><td> </td><td class="right">     3.1.  401 Unauthorized . . . . . . . . . . . . . . . . . . . . .  9</td><td class="lineno" valign="top"></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="left">     3.2.  407 Proxy Authentication Required  . . . . . . . . . . . .  9</td><td> </td><td class="right">     3.2.  407 Proxy Authentication Required  . . . . . . . . . . . .  9</td><td class="lineno" valign="top"></td></tr>
111      <tr><td class="lineno" valign="top"></td><td class="left">   4.  Header Field Definitions . . . . . . . . . . . . . . . . . . .  9</td><td> </td><td class="right">   4.  Header Field Definitions . . . . . . . . . . . . . . . . . . .  9</td><td class="lineno" valign="top"></td></tr>
112      <tr><td class="lineno" valign="top"></td><td class="left">     4.1.  Authorization  . . . . . . . . . . . . . . . . . . . . . .  9</td><td> </td><td class="right">     4.1.  Authorization  . . . . . . . . . . . . . . . . . . . . . .  9</td><td class="lineno" valign="top"></td></tr>
113      <tr><td class="lineno" valign="top"></td><td class="left">     4.2.  Proxy-Authenticate . . . . . . . . . . . . . . . . . . . . 10</td><td> </td><td class="right">     4.2.  Proxy-Authenticate . . . . . . . . . . . . . . . . . . . . 10</td><td class="lineno" valign="top"></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="left">     4.3.  Proxy-Authorization  . . . . . . . . . . . . . . . . . . . 10</td><td> </td><td class="right">     4.3.  Proxy-Authorization  . . . . . . . . . . . . . . . . . . . 10</td><td class="lineno" valign="top"></td></tr>
115      <tr><td><a name="diff0006" /></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="lblock">     4.4.  WWW-Authenticate . . . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock">     4.4.  WWW-Authenticate . . . . . . . . . . . . . . . . . . . . . <span class="insert">10</span></td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="lblock">   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . <span class="delete">12</span></td><td> </td><td class="rblock">   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="lblock">     5.1.  Authentication Scheme Registry . . . . . . . . . . . . . . <span class="delete">12</span></td><td> </td><td class="rblock">     5.1.  Authentication Scheme Registry . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="lblock">     5.2.  Status Code Registration . . . . . . . . . . . . . . . . . <span class="delete">12</span></td><td> </td><td class="rblock">     5.2.  Status Code Registration . . . . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="left">     5.3.  Header Field Registration  . . . . . . . . . . . . . . . . 12</td><td> </td><td class="right">     5.3.  Header Field Registration  . . . . . . . . . . . . . . . . 12</td><td class="lineno" valign="top"></td></tr>
121      <tr><td class="lineno" valign="top"></td><td class="left">   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12</td><td> </td><td class="right">   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12</td><td class="lineno" valign="top"></td></tr>
122      <tr><td><a name="diff0007" /></td></tr>
123      <tr><td class="lineno" valign="top"></td><td class="lblock">     6.1.  Authentication Credentials and Idle Clients  . . . . . . . 1<span class="delete">3</span></td><td> </td><td class="rblock">     6.1.  Authentication Credentials and Idle Clients  . . . . . . . 1<span class="insert">2</span></td><td class="lineno" valign="top"></td></tr>
124      <tr><td class="lineno" valign="top"></td><td class="left">     6.2.  Protection Spaces  . . . . . . . . . . . . . . . . . . . . 13</td><td> </td><td class="right">     6.2.  Protection Spaces  . . . . . . . . . . . . . . . . . . . . 13</td><td class="lineno" valign="top"></td></tr>
125      <tr><td class="lineno" valign="top"></td><td class="left">   7.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 13</td><td> </td><td class="right">   7.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 13</td><td class="lineno" valign="top"></td></tr>
126      <tr><td><a name="diff0008" /></td></tr>
127      <tr><td class="lineno" valign="top"></td><td class="lblock">   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
128      <tr><td class="lineno" valign="top"></td><td class="lblock">     8.1.  Normative References . . . . . . . . . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">     8.1.  Normative References . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">     8.2.  Informative References . . . . . . . . . . . . . . . . . . 14</td><td> </td><td class="right">     8.2.  Informative References . . . . . . . . . . . . . . . . . . 14</td><td class="lineno" valign="top"></td></tr>
130      <tr><td><a name="diff0009" /></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="lblock">   Appendix A.  Changes from RFCs 2616 and 2617 . . . . . . . . . . . 1<span class="delete">5</span></td><td> </td><td class="rblock">   Appendix A.  Changes from RFCs 2616 and 2617 . . . . . . . . . . . 1<span class="insert">4</span></td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix B.  Imported ABNF . . . . . . . . . . . . . . . . . . . . 15</td><td> </td><td class="right">   Appendix B.  Imported ABNF . . . . . . . . . . . . . . . . . . . . 15</td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix C.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">   Appendix C.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix D.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix D.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="left">                publication)  . . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">                publication)  . . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
136      <tr><td class="lineno" valign="top"></td><td class="left">     D.1.  Since draft-ietf-httpbis-p7-auth-19  . . . . . . . . . . . 16</td><td> </td><td class="right">     D.1.  Since draft-ietf-httpbis-p7-auth-19  . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="left">     D.2.  Since draft-ietf-httpbis-p7-auth-20  . . . . . . . . . . . 17</td><td> </td><td class="right">     D.2.  Since draft-ietf-httpbis-p7-auth-20  . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
138      <tr><td><a name="diff0010" /></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     D.3.  Since draft-ietf-httpbis-p7-auth-21  . . . . . . . . . . . 17</span></td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="left">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17</td><td> </td><td class="right">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="left">1.  Introduction</td><td> </td><td class="right">1.  Introduction</td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="left">   This document defines HTTP/1.1 access control and authentication.  It</td><td> </td><td class="right">   This document defines HTTP/1.1 access control and authentication.  It</td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="left">   includes the relevant parts of RFC 2616 with only minor changes</td><td> </td><td class="right">   includes the relevant parts of RFC 2616 with only minor changes</td><td class="lineno" valign="top"></td></tr>
146      <tr><td class="lineno" valign="top"></td><td class="left">   ([RFC2616]), plus the general framework for HTTP authentication, as</td><td> </td><td class="right">   ([RFC2616]), plus the general framework for HTTP authentication, as</td><td class="lineno" valign="top"></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="left">   previously defined in "HTTP Authentication: Basic and Digest Access</td><td> </td><td class="right">   previously defined in "HTTP Authentication: Basic and Digest Access</td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication" ([RFC2617]).</td><td> </td><td class="right">   Authentication" ([RFC2617]).</td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP provides several OPTIONAL challenge-response authentication</td><td> </td><td class="right">   HTTP provides several OPTIONAL challenge-response authentication</td><td class="lineno" valign="top"></td></tr>
151      <tr><td><a name="diff0011" /></td></tr>
152      <tr><td class="lineno" valign="top"></td><td class="lblock">   mechanisms <span class="delete">which</span> can be used by a server to challenge a client</td><td> </td><td class="rblock">   mechanisms <span class="insert">that</span> can be used by a server to challenge a client request</td><td class="lineno" valign="top"></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="lblock">   request and by a client to provide authentication information.  The</td><td> </td><td class="rblock">   and by a client to provide authentication information.  The "basic"</td><td class="lineno" valign="top"></td></tr>
154      <tr><td class="lineno" valign="top"></td><td class="lblock">   "basic" and "digest" authentication schemes continue to be specified</td><td> </td><td class="rblock">   and "digest" authentication schemes continue to be specified in RFC</td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="lblock">   in RFC 2617.</td><td> </td><td class="rblock">   2617.</td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="left">1.1.  Conformance and Error Handling</td><td> </td><td class="right">1.1.  Conformance and Error Handling</td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="left">   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",</td><td> </td><td class="right">   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",</td><td class="lineno" valign="top"></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="left">   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this</td><td> </td><td class="right">   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this</td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="left">   document are to be interpreted as described in [RFC2119].</td><td> </td><td class="right">   document are to be interpreted as described in [RFC2119].</td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="left">   Conformance criteria and considerations regarding error handling are</td><td> </td><td class="right">   Conformance criteria and considerations regarding error handling are</td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno" valign="top"></td><td class="left">   defined in Section 2.5 of [Part1].</td><td> </td><td class="right">   defined in Section 2.5 of [Part1].</td><td class="lineno" valign="top"></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
166      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
167      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 6, line 15</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 6, line 15</em></th><td></td></tr>
168      <tr><td class="lineno" valign="top"></td><td class="left">   (possibly at some point in the past).  When creating their values,</td><td> </td><td class="right">   (possibly at some point in the past).  When creating their values,</td><td class="lineno" valign="top"></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="left">   the user agent ought to do so by selecting the challenge with what it</td><td> </td><td class="right">   the user agent ought to do so by selecting the challenge with what it</td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="left">   considers to be the most secure auth-scheme that it understands,</td><td> </td><td class="right">   considers to be the most secure auth-scheme that it understands,</td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="left">   obtaining credentials from the user as appropriate.</td><td> </td><td class="right">   obtaining credentials from the user as appropriate.</td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="left">     credentials = auth-scheme [ 1*SP ( token68 / #auth-param ) ]</td><td> </td><td class="right">     credentials = auth-scheme [ 1*SP ( token68 / #auth-param ) ]</td><td class="lineno" valign="top"></td></tr>
174      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="left">   Upon a request for a protected resource that omits credentials,</td><td> </td><td class="right">   Upon a request for a protected resource that omits credentials,</td><td class="lineno" valign="top"></td></tr>
176      <tr><td class="lineno" valign="top"></td><td class="left">   contains invalid credentials (e.g., a bad password) or partial</td><td> </td><td class="right">   contains invalid credentials (e.g., a bad password) or partial</td><td class="lineno" valign="top"></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="left">   credentials (e.g., when the authentication scheme requires more than</td><td> </td><td class="right">   credentials (e.g., when the authentication scheme requires more than</td><td class="lineno" valign="top"></td></tr>
178      <tr><td><a name="diff0012" /></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="lblock">   one round trip), an origin server SHOULD <span class="delete">return</span> a 401 (Unauthorized)</td><td> </td><td class="rblock">   one round trip), an origin server SHOULD <span class="insert">send</span> a 401 (Unauthorized)</td><td class="lineno" valign="top"></td></tr>
180      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">response.  Such responses MUST include</span> a WWW-Authenticate header</td><td> </td><td class="rblock">   <span class="insert">response that contains</span> a WWW-Authenticate header field <span class="insert">with</span> at least</td><td class="lineno" valign="top"></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="lblock">   field <span class="delete">containing</span> at least one (possibly new) challenge applicable to</td><td> </td><td class="rblock">   one (possibly new) challenge applicable to the requested resource.</td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="lblock">   the requested resource.</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
183      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="left">   Likewise, upon a request that requires authentication by proxies that</td><td> </td><td class="right">   Likewise, upon a request that requires authentication by proxies that</td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="left">   omit credentials or contain invalid or partial credentials, a proxy</td><td> </td><td class="right">   omit credentials or contain invalid or partial credentials, a proxy</td><td class="lineno" valign="top"></td></tr>
186      <tr><td><a name="diff0013" /></td></tr>
187      <tr><td class="lineno" valign="top"></td><td class="lblock">   SHOULD <span class="delete">return</span> a 407 (Proxy Authentication Required) <span class="delete">response.  Such</span></td><td> </td><td class="rblock">   SHOULD <span class="insert">send</span> a 407 (Proxy Authentication Required) <span class="insert">response that</span></td><td class="lineno" valign="top"></td></tr>
188      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   responses MUST include</span> a Proxy-Authenticate header field <span class="delete">containing</span> a</td><td> </td><td class="rblock"><span class="insert">   contains</span> a Proxy-Authenticate header field <span class="insert">with</span> a (possibly new)</td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="lblock">   (possibly new) challenge applicable to the proxy.</td><td> </td><td class="rblock">   challenge applicable to the proxy.</td><td class="lineno" valign="top"></td></tr>
190      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="left">   A server receiving credentials that are valid, but not adequate to</td><td> </td><td class="right">   A server receiving credentials that are valid, but not adequate to</td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno" valign="top"></td><td class="left">   gain access, ought to respond with the 403 (Forbidden) status code</td><td> </td><td class="right">   gain access, ought to respond with the 403 (Forbidden) status code</td><td class="lineno" valign="top"></td></tr>
193      <tr><td><a name="diff0014" /></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="lblock">   (Section <span class="delete">7</span>.5.3 of [Part2]).</td><td> </td><td class="rblock">   (Section <span class="insert">6</span>.5.3 of [Part2]).</td><td class="lineno" valign="top"></td></tr>
195      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="left">   The HTTP protocol does not restrict applications to this simple</td><td> </td><td class="right">   The HTTP protocol does not restrict applications to this simple</td><td class="lineno" valign="top"></td></tr>
197      <tr><td class="lineno" valign="top"></td><td class="left">   challenge-response mechanism for access authentication.  Additional</td><td> </td><td class="right">   challenge-response mechanism for access authentication.  Additional</td><td class="lineno" valign="top"></td></tr>
198      <tr><td class="lineno" valign="top"></td><td class="left">   mechanisms MAY be used, such as encryption at the transport level or</td><td> </td><td class="right">   mechanisms MAY be used, such as encryption at the transport level or</td><td class="lineno" valign="top"></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="left">   via message encapsulation, and with additional header fields</td><td> </td><td class="right">   via message encapsulation, and with additional header fields</td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="left">   specifying authentication information.  However, such additional</td><td> </td><td class="right">   specifying authentication information.  However, such additional</td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="left">   mechanisms are not defined by this specification.</td><td> </td><td class="right">   mechanisms are not defined by this specification.</td><td class="lineno" valign="top"></td></tr>
202      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
203      <tr><td class="lineno" valign="top"></td><td class="left">   Proxies MUST forward the WWW-Authenticate and Authorization header</td><td> </td><td class="right">   Proxies MUST forward the WWW-Authenticate and Authorization header</td><td class="lineno" valign="top"></td></tr>
204      <tr><td class="lineno" valign="top"></td><td class="left">   fields unmodified and follow the rules found in Section 4.1.</td><td> </td><td class="right">   fields unmodified and follow the rules found in Section 4.1.</td><td class="lineno" valign="top"></td></tr>
205      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
206      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 7, line 4</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 6, line 51</em></th><td></td></tr>
207      <tr><td class="lineno" valign="top"></td><td class="left">   The authentication parameter realm is reserved for use by</td><td> </td><td class="right">   The authentication parameter realm is reserved for use by</td><td class="lineno" valign="top"></td></tr>
208      <tr><td class="lineno" valign="top"></td><td class="left">   authentication schemes that wish to indicate the scope of protection.</td><td> </td><td class="right">   authentication schemes that wish to indicate the scope of protection.</td><td class="lineno" valign="top"></td></tr>
209      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="left">   A protection space is defined by the canonical root URI (the scheme</td><td> </td><td class="right">   A protection space is defined by the canonical root URI (the scheme</td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="left">   and authority components of the effective request URI; see Section</td><td> </td><td class="right">   and authority components of the effective request URI; see Section</td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="left">   5.5 of [Part1]) of the server being accessed, in combination with the</td><td> </td><td class="right">   5.5 of [Part1]) of the server being accessed, in combination with the</td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="left">   realm value if present.  These realms allow the protected resources</td><td> </td><td class="right">   realm value if present.  These realms allow the protected resources</td><td class="lineno" valign="top"></td></tr>
214      <tr><td class="lineno" valign="top"></td><td class="left">   on a server to be partitioned into a set of protection spaces, each</td><td> </td><td class="right">   on a server to be partitioned into a set of protection spaces, each</td><td class="lineno" valign="top"></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="left">   with its own authentication scheme and/or authorization database.</td><td> </td><td class="right">   with its own authentication scheme and/or authorization database.</td><td class="lineno" valign="top"></td></tr>
216      <tr><td class="lineno" valign="top"></td><td class="left">   The realm value is a string, generally assigned by the origin server,</td><td> </td><td class="right">   The realm value is a string, generally assigned by the origin server,</td><td class="lineno" valign="top"></td></tr>
217      <tr><td><a name="diff0015" /></td></tr>
218      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">which</span> can have additional semantics specific to the authentication</td><td> </td><td class="rblock">   <span class="insert">that</span> can have additional semantics specific to the authentication</td><td class="lineno" valign="top"></td></tr>
219      <tr><td class="lineno" valign="top"></td><td class="left">   scheme.  Note that there can be multiple challenges with the same</td><td> </td><td class="right">   scheme.  Note that there can be multiple challenges with the same</td><td class="lineno" valign="top"></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="left">   auth-scheme but different realms.</td><td> </td><td class="right">   auth-scheme but different realms.</td><td class="lineno" valign="top"></td></tr>
221      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
222      <tr><td class="lineno" valign="top"></td><td class="left">   The protection space determines the domain over which credentials can</td><td> </td><td class="right">   The protection space determines the domain over which credentials can</td><td class="lineno" valign="top"></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="left">   be automatically applied.  If a prior request has been authorized,</td><td> </td><td class="right">   be automatically applied.  If a prior request has been authorized,</td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="left">   the same credentials MAY be reused for all other requests within that</td><td> </td><td class="right">   the same credentials MAY be reused for all other requests within that</td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="left">   protection space for a period of time determined by the</td><td> </td><td class="right">   protection space for a period of time determined by the</td><td class="lineno" valign="top"></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left">   authentication scheme, parameters, and/or user preference.  Unless</td><td> </td><td class="right">   authentication scheme, parameters, and/or user preference.  Unless</td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left">   otherwise defined by the authentication scheme, a single protection</td><td> </td><td class="right">   otherwise defined by the authentication scheme, a single protection</td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">   space cannot extend outside the scope of its server.</td><td> </td><td class="right">   space cannot extend outside the scope of its server.</td><td class="lineno" valign="top"></td></tr>
229      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
230      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 8, line 46</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 8, line 45</em></th><td></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="left">   o  Authentication schemes need to document whether they are usable in</td><td> </td><td class="right">   o  Authentication schemes need to document whether they are usable in</td><td class="lineno" valign="top"></td></tr>
233      <tr><td class="lineno" valign="top"></td><td class="left">      origin-server authentication (i.e., using WWW-Authenticate),</td><td> </td><td class="right">      origin-server authentication (i.e., using WWW-Authenticate),</td><td class="lineno" valign="top"></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="left">      and/or proxy authentication (i.e., using Proxy-Authenticate).</td><td> </td><td class="right">      and/or proxy authentication (i.e., using Proxy-Authenticate).</td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
236      <tr><td class="lineno" valign="top"></td><td class="left">   o  The credentials carried in an Authorization header field are</td><td> </td><td class="right">   o  The credentials carried in an Authorization header field are</td><td class="lineno" valign="top"></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="left">      specific to the User Agent, and therefore have the same effect on</td><td> </td><td class="right">      specific to the User Agent, and therefore have the same effect on</td><td class="lineno" valign="top"></td></tr>
238      <tr><td class="lineno" valign="top"></td><td class="left">      HTTP caches as the "private" Cache-Control response directive,</td><td> </td><td class="right">      HTTP caches as the "private" Cache-Control response directive,</td><td class="lineno" valign="top"></td></tr>
239      <tr><td class="lineno" valign="top"></td><td class="left">      within the scope of the request they appear in.</td><td> </td><td class="right">      within the scope of the request they appear in.</td><td class="lineno" valign="top"></td></tr>
240      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
241      <tr><td><a name="diff0016" /></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="lblock">      Therefore, new authentication schemes <span class="delete">which</span> choose not to carry</td><td> </td><td class="rblock">      Therefore, new authentication schemes <span class="insert">that</span> choose not to carry</td><td class="lineno" valign="top"></td></tr>
243      <tr><td class="lineno" valign="top"></td><td class="left">      credentials in the Authorization header field (e.g., using a newly</td><td> </td><td class="right">      credentials in the Authorization header field (e.g., using a newly</td><td class="lineno" valign="top"></td></tr>
244      <tr><td class="lineno" valign="top"></td><td class="left">      defined header field) will need to explicitly disallow caching, by</td><td> </td><td class="right">      defined header field) will need to explicitly disallow caching, by</td><td class="lineno" valign="top"></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="left">      mandating the use of either Cache-Control request directives</td><td> </td><td class="right">      mandating the use of either Cache-Control request directives</td><td class="lineno" valign="top"></td></tr>
246      <tr><td class="lineno" valign="top"></td><td class="left">      (e.g., "no-store") or response directives (e.g., "private").</td><td> </td><td class="right">      (e.g., "no-store") or response directives (e.g., "private").</td><td class="lineno" valign="top"></td></tr>
247      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="left">3.  Status Code Definitions</td><td> </td><td class="right">3.  Status Code Definitions</td><td class="lineno" valign="top"></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">3.1.  401 Unauthorized</td><td> </td><td class="right">3.1.  401 Unauthorized</td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
252      <tr><td><a name="diff0017" /></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="lblock">   The request <span class="delete">requires user authentication.</span>  The <span class="delete">response</span> MUST <span class="delete">include</span></td><td> </td><td class="rblock">   The <span class="insert">401 (Unauthorized) status code indicates that the</span> request <span class="insert">has not</span></td><td class="lineno" valign="top"></td></tr>
254      <tr><td class="lineno" valign="top"></td><td class="lblock">   a WWW-Authenticate header field (Section 4.4) containing <span class="delete">a</span> challenge</td><td> </td><td class="rblock"><span class="insert">   been applied because it lacks valid authentication credentials for</span></td><td class="lineno" valign="top"></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="lblock">   applicable to the target resource.  <span class="delete">The client MAY repeat the request</span></td><td> </td><td class="rblock"><span class="insert">   the target resource.</span>  The <span class="insert">origin server</span> MUST <span class="insert">send</span> a WWW-Authenticate</td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   with a suitable Authorization header field (Section 4.1).</span>  If the</td><td> </td><td class="rblock">   header field (Section 4.4) containing <span class="insert">at least one</span> challenge</td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="lblock">   request <span class="delete">already</span> included <span class="delete">Authorization</span> credentials, then the 401</td><td> </td><td class="rblock">   applicable to the target resource.  If the request included</td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="lblock">   response indicates that authorization has been refused for those</td><td> </td><td class="rblock">   <span class="insert">authentication</span> credentials, then the 401 response indicates that</td><td class="lineno" valign="top"></td></tr>
259      <tr><td class="lineno" valign="top"></td><td class="lblock">   credentials.  If the 401 response contains the same challenge as the</td><td> </td><td class="rblock">   authorization has been refused for those credentials.  <span class="insert">The client MAY</span></td><td class="lineno" valign="top"></td></tr>
260      <tr><td class="lineno" valign="top"></td><td class="lblock">   prior response, and the user agent has already attempted</td><td> </td><td class="rblock"><span class="insert">   repeat the request with a new or replaced Authorization header field</span></td><td class="lineno" valign="top"></td></tr>
261      <tr><td class="lineno" valign="top"></td><td class="lblock">   authentication at least once, then the user SHOULD <span class="delete">be presented</span> the</td><td> </td><td class="rblock"><span class="insert">   (Section 4.1).</span>  If the 401 response contains the same challenge as</td><td class="lineno" valign="top"></td></tr>
262      <tr><td class="lineno" valign="top"></td><td class="lblock">   representation <span class="delete">that was given in</span> the <span class="delete">response,</span> since <span class="delete">that</span></td><td> </td><td class="rblock">   the prior response, and the user agent has already attempted</td><td class="lineno" valign="top"></td></tr>
263      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   representation might include</span> relevant diagnostic information.</td><td> </td><td class="rblock">   authentication at least once, then the user <span class="insert">agent</span> SHOULD <span class="insert">present</span> the</td><td class="lineno" valign="top"></td></tr>
264      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">enclosed</span> representation <span class="insert">to</span> the <span class="insert">user,</span> since <span class="insert">it usually contains</span></td><td class="lineno" valign="top"></td></tr>
265      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   relevant diagnostic information.</td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
267      <tr><td class="lineno" valign="top"></td><td class="left">3.2.  407 Proxy Authentication Required</td><td> </td><td class="right">3.2.  407 Proxy Authentication Required</td><td class="lineno" valign="top"></td></tr>
268      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
269      <tr><td><a name="diff0018" /></td></tr>
270      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">This</span> code is similar to 401 (Unauthorized), but indicates that the</td><td> </td><td class="rblock">   <span class="insert">The 407 (Proxy Authentication Required) status</span> code is similar to 401</td><td class="lineno" valign="top"></td></tr>
271      <tr><td class="lineno" valign="top"></td><td class="lblock">   client <span class="delete">ought</span> to <span class="delete">first</span> authenticate itself <span class="delete">with the</span> proxy.  The proxy</td><td> </td><td class="rblock">   (Unauthorized), but indicates that the client <span class="insert">needs</span> to authenticate</td><td class="lineno" valign="top"></td></tr>
272      <tr><td class="lineno" valign="top"></td><td class="lblock">   MUST <span class="delete">return</span> a <span class="delete">Proxy-Authenticate</span> header field (Section 4.2)</td><td> </td><td class="rblock">   itself <span class="insert">in order to use a</span> proxy.  The proxy MUST <span class="insert">send</span> a <span class="insert">Proxy-</span></td><td class="lineno" valign="top"></td></tr>
273      <tr><td class="lineno" valign="top"></td><td class="lblock">   containing a challenge applicable to <span class="delete">the</span> proxy for the target</td><td> </td><td class="rblock"><span class="insert">   Authenticate</span> header field (Section 4.2) containing a challenge</td><td class="lineno" valign="top"></td></tr>
274      <tr><td class="lineno" valign="top"></td><td class="lblock">   resource.  The client MAY repeat the request with a <span class="delete">suitable Proxy-</span></td><td> </td><td class="rblock">   applicable to <span class="insert">that</span> proxy for the target resource.  The client MAY</td><td class="lineno" valign="top"></td></tr>
275      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Authorization</span> header field (Section 4.3).</td><td> </td><td class="rblock">   repeat the request with a <span class="insert">new or replaced Proxy-Authorization</span> header</td><td class="lineno" valign="top"></td></tr>
276      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   field (Section 4.3).</td><td class="lineno" valign="top"></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
278      <tr><td class="lineno" valign="top"></td><td class="left">4.  Header Field Definitions</td><td> </td><td class="right">4.  Header Field Definitions</td><td class="lineno" valign="top"></td></tr>
279      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
280      <tr><td class="lineno" valign="top"></td><td class="left">   This section defines the syntax and semantics of HTTP/1.1 header</td><td> </td><td class="right">   This section defines the syntax and semantics of HTTP/1.1 header</td><td class="lineno" valign="top"></td></tr>
281      <tr><td class="lineno" valign="top"></td><td class="left">   fields related to authentication.</td><td> </td><td class="right">   fields related to authentication.</td><td class="lineno" valign="top"></td></tr>
282      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="left">4.1.  Authorization</td><td> </td><td class="right">4.1.  Authorization</td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
285      <tr><td class="lineno" valign="top"></td><td class="left">   The "Authorization" header field allows a user agent to authenticate</td><td> </td><td class="right">   The "Authorization" header field allows a user agent to authenticate</td><td class="lineno" valign="top"></td></tr>
286      <tr><td class="lineno" valign="top"></td><td class="left">   itself with a server -- usually, but not necessarily, after receiving</td><td> </td><td class="right">   itself with a server -- usually, but not necessarily, after receiving</td><td class="lineno" valign="top"></td></tr>
287      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
288      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 9, line 51</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 10, line 5</em></th><td></td></tr>
289      <tr><td class="lineno" valign="top"></td><td class="left">   resource being requested.</td><td> </td><td class="right">   resource being requested.</td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
291      <tr><td class="lineno" valign="top"></td><td class="left">     Authorization = credentials</td><td> </td><td class="right">     Authorization = credentials</td><td class="lineno" valign="top"></td></tr>
292      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="left">   If a request is authenticated and a realm specified, the same</td><td> </td><td class="right">   If a request is authenticated and a realm specified, the same</td><td class="lineno" valign="top"></td></tr>
294      <tr><td class="lineno" valign="top"></td><td class="left">   credentials SHOULD be valid for all other requests within this realm</td><td> </td><td class="right">   credentials SHOULD be valid for all other requests within this realm</td><td class="lineno" valign="top"></td></tr>
295      <tr><td class="lineno" valign="top"></td><td class="left">   (assuming that the authentication scheme itself does not require</td><td> </td><td class="right">   (assuming that the authentication scheme itself does not require</td><td class="lineno" valign="top"></td></tr>
296      <tr><td class="lineno" valign="top"></td><td class="left">   otherwise, such as credentials that vary according to a challenge</td><td> </td><td class="right">   otherwise, such as credentials that vary according to a challenge</td><td class="lineno" valign="top"></td></tr>
297      <tr><td class="lineno" valign="top"></td><td class="left">   value or using synchronized clocks).</td><td> </td><td class="right">   value or using synchronized clocks).</td><td class="lineno" valign="top"></td></tr>
298      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
299      <tr><td><a name="diff0019" /></td></tr>
300      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">When a shared cache (see</span> Section <span class="delete">1.2</span> of <span class="delete">[Part6]) receives a request</span></td><td> </td><td class="rblock">   <span class="insert">See</span> Section <span class="insert">3.2</span> of <span class="insert">[Part6]</span> for <span class="insert">details of and requirements pertaining</span></td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   containing an Authorization field, it MUST NOT return the</span></td><td> </td><td class="rblock">   to <span class="insert">handling of</span> the <span class="insert">Authorization field by HTTP caches.</span></td><td class="lineno" valign="top"></td></tr>
302      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   corresponding response as a reply to any other request, unless one of</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
303      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   the following specific exceptions holds:</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
305      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   1.  If the response includes the "s-maxage" cache-control directive,</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
306      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       the cache MAY use that response in replying to a subsequent</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
307      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       request.  But (if the specified maximum age has passed) a proxy</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
308      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       cache MUST first revalidate it with the origin server, using the</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
309      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       header fields from the new request to allow the origin server to</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
310      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       authenticate the new request.  (This is the defined behavior</span> for</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
311      <tr><td class="lineno" valign="top"></td><td class="lblock">       <span class="delete">s-maxage.)  If the response includes "s-maxage=0", the proxy MUST</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
312      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       always revalidate it before re-using it.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
313      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   2.  If the response includes the "must-revalidate" cache-control</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
315      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       directive, the cache MAY use that response in replying to a</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
316      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       subsequent request.  But if the response is stale, all caches</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
317      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       MUST first revalidate it with the origin server, using the header</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
318      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       fields from the new request to allow the origin server</span> to</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="lblock">       <span class="delete">authenticate the new request.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
320      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
321      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   3.  If the response includes</span> the <span class="delete">"public" cache-control directive, it</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">       MAY be returned in reply to any subsequent request.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
323      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
324      <tr><td class="lineno" valign="top"></td><td class="left">4.2.  Proxy-Authenticate</td><td> </td><td class="right">4.2.  Proxy-Authenticate</td><td class="lineno" valign="top"></td></tr>
325      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
326      <tr><td class="lineno" valign="top"></td><td class="left">   The "Proxy-Authenticate" header field consists of at least one</td><td> </td><td class="right">   The "Proxy-Authenticate" header field consists of at least one</td><td class="lineno" valign="top"></td></tr>
327      <tr><td class="lineno" valign="top"></td><td class="left">   challenge that indicates the authentication scheme(s) and parameters</td><td> </td><td class="right">   challenge that indicates the authentication scheme(s) and parameters</td><td class="lineno" valign="top"></td></tr>
328      <tr><td class="lineno" valign="top"></td><td class="left">   applicable to the proxy for this effective request URI (Section 5.5</td><td> </td><td class="right">   applicable to the proxy for this effective request URI (Section 5.5</td><td class="lineno" valign="top"></td></tr>
329      <tr><td class="lineno" valign="top"></td><td class="left">   of [Part1]).  It MUST be included as part of a 407 (Proxy</td><td> </td><td class="right">   of [Part1]).  It MUST be included as part of a 407 (Proxy</td><td class="lineno" valign="top"></td></tr>
330      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication Required) response.</td><td> </td><td class="right">   Authentication Required) response.</td><td class="lineno" valign="top"></td></tr>
331      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
332      <tr><td class="lineno" valign="top"></td><td class="left">     Proxy-Authenticate = 1#challenge</td><td> </td><td class="right">     Proxy-Authenticate = 1#challenge</td><td class="lineno" valign="top"></td></tr>
333      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
334      <tr bgcolor="gray" ><td></td><th><a name="part-l7" /><small>skipping to change at</small><em> page 10, line 49</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 10, line 31</em></th><td></td></tr>
335      <tr><td class="lineno" valign="top"></td><td class="left">   to obtain its own credentials by requesting them from the downstream</td><td> </td><td class="right">   to obtain its own credentials by requesting them from the downstream</td><td class="lineno" valign="top"></td></tr>
336      <tr><td class="lineno" valign="top"></td><td class="left">   client, which in some circumstances will appear as if the proxy is</td><td> </td><td class="right">   client, which in some circumstances will appear as if the proxy is</td><td class="lineno" valign="top"></td></tr>
337      <tr><td class="lineno" valign="top"></td><td class="left">   forwarding the Proxy-Authenticate header field.</td><td> </td><td class="right">   forwarding the Proxy-Authenticate header field.</td><td class="lineno" valign="top"></td></tr>
338      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
339      <tr><td class="lineno" valign="top"></td><td class="left">   Note that the parsing considerations for WWW-Authenticate apply to</td><td> </td><td class="right">   Note that the parsing considerations for WWW-Authenticate apply to</td><td class="lineno" valign="top"></td></tr>
340      <tr><td class="lineno" valign="top"></td><td class="left">   this header field as well; see Section 4.4 for details.</td><td> </td><td class="right">   this header field as well; see Section 4.4 for details.</td><td class="lineno" valign="top"></td></tr>
341      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
342      <tr><td class="lineno" valign="top"></td><td class="left">4.3.  Proxy-Authorization</td><td> </td><td class="right">4.3.  Proxy-Authorization</td><td class="lineno" valign="top"></td></tr>
343      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
344      <tr><td class="lineno" valign="top"></td><td class="left">   The "Proxy-Authorization" header field allows the client to identify</td><td> </td><td class="right">   The "Proxy-Authorization" header field allows the client to identify</td><td class="lineno" valign="top"></td></tr>
345      <tr><td><a name="diff0020" /></td></tr>
346      <tr><td class="lineno" valign="top"></td><td class="lblock">   itself (or its user) to a proxy <span class="delete">which</span> requires authentication.  Its</td><td> </td><td class="rblock">   itself (or its user) to a proxy <span class="insert">that</span> requires authentication.  Its</td><td class="lineno" valign="top"></td></tr>
347      <tr><td class="lineno" valign="top"></td><td class="left">   value consists of credentials containing the authentication</td><td> </td><td class="right">   value consists of credentials containing the authentication</td><td class="lineno" valign="top"></td></tr>
348      <tr><td class="lineno" valign="top"></td><td class="left">   information of the user agent for the proxy and/or realm of the</td><td> </td><td class="right">   information of the user agent for the proxy and/or realm of the</td><td class="lineno" valign="top"></td></tr>
349      <tr><td class="lineno" valign="top"></td><td class="left">   resource being requested.</td><td> </td><td class="right">   resource being requested.</td><td class="lineno" valign="top"></td></tr>
350      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
351      <tr><td class="lineno" valign="top"></td><td class="left">     Proxy-Authorization = credentials</td><td> </td><td class="right">     Proxy-Authorization = credentials</td><td class="lineno" valign="top"></td></tr>
352      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
353      <tr><td class="lineno" valign="top"></td><td class="left">   Unlike Authorization, the Proxy-Authorization header field applies</td><td> </td><td class="right">   Unlike Authorization, the Proxy-Authorization header field applies</td><td class="lineno" valign="top"></td></tr>
354      <tr><td class="lineno" valign="top"></td><td class="left">   only to the next outbound proxy that demanded authentication using</td><td> </td><td class="right">   only to the next outbound proxy that demanded authentication using</td><td class="lineno" valign="top"></td></tr>
355      <tr><td class="lineno" valign="top"></td><td class="left">   the Proxy-Authenticate field.  When multiple proxies are used in a</td><td> </td><td class="right">   the Proxy-Authenticate field.  When multiple proxies are used in a</td><td class="lineno" valign="top"></td></tr>
356      <tr><td class="lineno" valign="top"></td><td class="left">   chain, the Proxy-Authorization header field is consumed by the first</td><td> </td><td class="right">   chain, the Proxy-Authorization header field is consumed by the first</td><td class="lineno" valign="top"></td></tr>
357      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
358      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 12, line 32</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 12, line 16</em></th><td></td></tr>
359      <tr><td class="lineno" valign="top"></td><td class="left">   | Value | Description                   | Reference   |</td><td> </td><td class="right">   | Value | Description                   | Reference   |</td><td class="lineno" valign="top"></td></tr>
360      <tr><td class="lineno" valign="top"></td><td class="left">   +-------+-------------------------------+-------------+</td><td> </td><td class="right">   +-------+-------------------------------+-------------+</td><td class="lineno" valign="top"></td></tr>
361      <tr><td class="lineno" valign="top"></td><td class="left">   | 401   | Unauthorized                  | Section 3.1 |</td><td> </td><td class="right">   | 401   | Unauthorized                  | Section 3.1 |</td><td class="lineno" valign="top"></td></tr>
362      <tr><td class="lineno" valign="top"></td><td class="left">   | 407   | Proxy Authentication Required | Section 3.2 |</td><td> </td><td class="right">   | 407   | Proxy Authentication Required | Section 3.2 |</td><td class="lineno" valign="top"></td></tr>
363      <tr><td class="lineno" valign="top"></td><td class="left">   +-------+-------------------------------+-------------+</td><td> </td><td class="right">   +-------+-------------------------------+-------------+</td><td class="lineno" valign="top"></td></tr>
364      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
365      <tr><td class="lineno" valign="top"></td><td class="left">5.3.  Header Field Registration</td><td> </td><td class="right">5.3.  Header Field Registration</td><td class="lineno" valign="top"></td></tr>
366      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
367      <tr><td class="lineno" valign="top"></td><td class="left">   The Message Header Field Registry located at &lt;http://www.iana.org/</td><td> </td><td class="right">   The Message Header Field Registry located at &lt;http://www.iana.org/</td><td class="lineno" valign="top"></td></tr>
368      <tr><td class="lineno" valign="top"></td><td class="left">   assignments/message-headers/message-header-index.html&gt; shall be</td><td> </td><td class="right">   assignments/message-headers/message-header-index.html&gt; shall be</td><td class="lineno" valign="top"></td></tr>
369      <tr><td><a name="diff0021" /></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="lblock">   updated with the permanent registrations below (see [<span class="delete">RFC3864</span>]):</td><td> </td><td class="rblock">   updated with the permanent registrations below (see [<span class="insert">BCP90</span>]):</td><td class="lineno" valign="top"></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
372      <tr><td class="lineno" valign="top"></td><td class="left">   +---------------------+----------+----------+-------------+</td><td> </td><td class="right">   +---------------------+----------+----------+-------------+</td><td class="lineno" valign="top"></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="left">   | Header Field Name   | Protocol | Status   | Reference   |</td><td> </td><td class="right">   | Header Field Name   | Protocol | Status   | Reference   |</td><td class="lineno" valign="top"></td></tr>
374      <tr><td class="lineno" valign="top"></td><td class="left">   +---------------------+----------+----------+-------------+</td><td> </td><td class="right">   +---------------------+----------+----------+-------------+</td><td class="lineno" valign="top"></td></tr>
375      <tr><td class="lineno" valign="top"></td><td class="left">   | Authorization       | http     | standard | Section 4.1 |</td><td> </td><td class="right">   | Authorization       | http     | standard | Section 4.1 |</td><td class="lineno" valign="top"></td></tr>
376      <tr><td class="lineno" valign="top"></td><td class="left">   | Proxy-Authenticate  | http     | standard | Section 4.2 |</td><td> </td><td class="right">   | Proxy-Authenticate  | http     | standard | Section 4.2 |</td><td class="lineno" valign="top"></td></tr>
377      <tr><td class="lineno" valign="top"></td><td class="left">   | Proxy-Authorization | http     | standard | Section 4.3 |</td><td> </td><td class="right">   | Proxy-Authorization | http     | standard | Section 4.3 |</td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="left">   | WWW-Authenticate    | http     | standard | Section 4.4 |</td><td> </td><td class="right">   | WWW-Authenticate    | http     | standard | Section 4.4 |</td><td class="lineno" valign="top"></td></tr>
379      <tr><td class="lineno" valign="top"></td><td class="left">   +---------------------+----------+----------+-------------+</td><td> </td><td class="right">   +---------------------+----------+----------+-------------+</td><td class="lineno" valign="top"></td></tr>
380      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
381      <tr><td class="lineno" valign="top"></td><td class="left">   The change controller is: "IETF (iesg@ietf.org) - Internet</td><td> </td><td class="right">   The change controller is: "IETF (iesg@ietf.org) - Internet</td><td class="lineno" valign="top"></td></tr>
382      <tr><td class="lineno" valign="top"></td><td class="left">   Engineering Task Force".</td><td> </td><td class="right">   Engineering Task Force".</td><td class="lineno" valign="top"></td></tr>
383      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
384      <tr><td class="lineno" valign="top"></td><td class="left">6.  Security Considerations</td><td> </td><td class="right">6.  Security Considerations</td><td class="lineno" valign="top"></td></tr>
385      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
386      <tr><td><a name="diff0022" /></td></tr>
387      <tr><td class="lineno" valign="top"></td><td class="lblock">   This section is meant to inform <span class="delete">application</span> developers, information</td><td> </td><td class="rblock">   This section is meant to inform developers, information providers,</td><td class="lineno" valign="top"></td></tr>
388      <tr><td class="lineno" valign="top"></td><td class="lblock">   providers, and users of <span class="delete">the</span> security <span class="delete">limitations in HTTP/1.1 as</span></td><td> </td><td class="rblock">   and users of <span class="insert">known</span> security <span class="insert">concerns specific</span> to <span class="insert">HTTP/1.1</span></td><td class="lineno" valign="top"></td></tr>
389      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   described by this document.  The discussion does not include</span></td><td> </td><td class="rblock"><span class="insert">   authentication.  More general</span> security <span class="insert">considerations are addressed</span></td><td class="lineno" valign="top"></td></tr>
390      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   definitive solutions</span> to <span class="delete">the problems revealed, though it does make</span></td><td> </td><td class="rblock"><span class="insert">   in HTTP messaging [Part1] and semantics [Part2].</span></td><td class="lineno" valign="top"></td></tr>
391      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   some suggestions for reducing</span> security <span class="delete">risks.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
392      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
393      <tr><td class="lineno" valign="top"></td><td class="left">6.1.  Authentication Credentials and Idle Clients</td><td> </td><td class="right">6.1.  Authentication Credentials and Idle Clients</td><td class="lineno" valign="top"></td></tr>
394      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
395      <tr><td class="lineno" valign="top"></td><td class="left">   Existing HTTP clients and user agents typically retain authentication</td><td> </td><td class="right">   Existing HTTP clients and user agents typically retain authentication</td><td class="lineno" valign="top"></td></tr>
396      <tr><td class="lineno" valign="top"></td><td class="left">   information indefinitely.  HTTP/1.1 does not provide a method for a</td><td> </td><td class="right">   information indefinitely.  HTTP/1.1 does not provide a method for a</td><td class="lineno" valign="top"></td></tr>
397      <tr><td class="lineno" valign="top"></td><td class="left">   server to direct clients to discard these cached credentials.  This</td><td> </td><td class="right">   server to direct clients to discard these cached credentials.  This</td><td class="lineno" valign="top"></td></tr>
398      <tr><td class="lineno" valign="top"></td><td class="left">   is a significant defect that requires further extensions to HTTP.</td><td> </td><td class="right">   is a significant defect that requires further extensions to HTTP.</td><td class="lineno" valign="top"></td></tr>
399      <tr><td class="lineno" valign="top"></td><td class="left">   Circumstances under which credential caching can interfere with the</td><td> </td><td class="right">   Circumstances under which credential caching can interfere with the</td><td class="lineno" valign="top"></td></tr>
400      <tr><td class="lineno" valign="top"></td><td class="left">   application's security model include but are not limited to:</td><td> </td><td class="right">   application's security model include but are not limited to:</td><td class="lineno" valign="top"></td></tr>
401      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
402      <tr><td><a name="diff0023" /></td></tr>
403      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  Clients <span class="delete">which</span> have been idle for an extended <span class="delete">period</span> following</td><td> </td><td class="rblock">   o  Clients <span class="insert">that</span> have been idle for an extended <span class="insert">period,</span> following</td><td class="lineno" valign="top"></td></tr>
404      <tr><td class="lineno" valign="top"></td><td class="lblock">      which the server might wish to cause the client to <span class="delete">reprompt</span> the</td><td> </td><td class="rblock">      which the server might wish to cause the client to <span class="insert">re-prompt</span> the</td><td class="lineno" valign="top"></td></tr>
405      <tr><td class="lineno" valign="top"></td><td class="left">      user for credentials.</td><td> </td><td class="right">      user for credentials.</td><td class="lineno" valign="top"></td></tr>
406      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
407      <tr><td><a name="diff0024" /></td></tr>
408      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  Applications <span class="delete">which</span> include a session termination indication (such</td><td> </td><td class="rblock">   o  Applications <span class="insert">that</span> include a session termination indication (such</td><td class="lineno" valign="top"></td></tr>
409      <tr><td class="lineno" valign="top"></td><td class="left">      as a "logout" or "commit" button on a page) after which the server</td><td> </td><td class="right">      as a "logout" or "commit" button on a page) after which the server</td><td class="lineno" valign="top"></td></tr>
410      <tr><td class="lineno" valign="top"></td><td class="left">      side of the application "knows" that there is no further reason</td><td> </td><td class="right">      side of the application "knows" that there is no further reason</td><td class="lineno" valign="top"></td></tr>
411      <tr><td class="lineno" valign="top"></td><td class="left">      for the client to retain the credentials.</td><td> </td><td class="right">      for the client to retain the credentials.</td><td class="lineno" valign="top"></td></tr>
412      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
413      <tr><td class="lineno" valign="top"></td><td class="left">   This is currently under separate study.  There are a number of work-</td><td> </td><td class="right">   This is currently under separate study.  There are a number of work-</td><td class="lineno" valign="top"></td></tr>
414      <tr><td class="lineno" valign="top"></td><td class="left">   arounds to parts of this problem, and we encourage the use of</td><td> </td><td class="right">   arounds to parts of this problem, and we encourage the use of</td><td class="lineno" valign="top"></td></tr>
415      <tr><td class="lineno" valign="top"></td><td class="left">   password protection in screen savers, idle time-outs, and other</td><td> </td><td class="right">   password protection in screen savers, idle time-outs, and other</td><td class="lineno" valign="top"></td></tr>
416      <tr><td><a name="diff0025" /></td></tr>
417      <tr><td class="lineno" valign="top"></td><td class="lblock">   methods <span class="delete">which</span> mitigate the security problems inherent in this</td><td> </td><td class="rblock">   methods <span class="insert">that</span> mitigate the security problems inherent in this problem.</td><td class="lineno" valign="top"></td></tr>
418      <tr><td class="lineno" valign="top"></td><td class="lblock">   problem.  In particular, user agents <span class="delete">which</span> cache credentials are</td><td> </td><td class="rblock">   In particular, user agents <span class="insert">that</span> cache credentials are encouraged to</td><td class="lineno" valign="top"></td></tr>
419      <tr><td class="lineno" valign="top"></td><td class="lblock">   encouraged to provide a readily accessible mechanism for discarding</td><td> </td><td class="rblock">   provide a readily accessible mechanism for discarding cached</td><td class="lineno" valign="top"></td></tr>
420      <tr><td class="lineno" valign="top"></td><td class="lblock">   cached credentials under user control.</td><td> </td><td class="rblock">   credentials under user control.</td><td class="lineno" valign="top"></td></tr>
421      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
422      <tr><td class="lineno" valign="top"></td><td class="left">6.2.  Protection Spaces</td><td> </td><td class="right">6.2.  Protection Spaces</td><td class="lineno" valign="top"></td></tr>
423      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
424      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication schemes that solely rely on the "realm" mechanism for</td><td> </td><td class="right">   Authentication schemes that solely rely on the "realm" mechanism for</td><td class="lineno" valign="top"></td></tr>
425      <tr><td class="lineno" valign="top"></td><td class="left">   establishing a protection space will expose credentials to all</td><td> </td><td class="right">   establishing a protection space will expose credentials to all</td><td class="lineno" valign="top"></td></tr>
426      <tr><td class="lineno" valign="top"></td><td class="left">   resources on a server.  Clients that have successfully made</td><td> </td><td class="right">   resources on a server.  Clients that have successfully made</td><td class="lineno" valign="top"></td></tr>
427      <tr><td class="lineno" valign="top"></td><td class="left">   authenticated requests with a resource can use the same</td><td> </td><td class="right">   authenticated requests with a resource can use the same</td><td class="lineno" valign="top"></td></tr>
428      <tr><td class="lineno" valign="top"></td><td class="left">   authentication credentials for other resources on the same server.</td><td> </td><td class="right">   authentication credentials for other resources on the same server.</td><td class="lineno" valign="top"></td></tr>
429      <tr><td class="lineno" valign="top"></td><td class="left">   This makes it possible for a different resource to harvest</td><td> </td><td class="right">   This makes it possible for a different resource to harvest</td><td class="lineno" valign="top"></td></tr>
430      <tr><td class="lineno" valign="top"></td><td class="left">   authentication credentials for other resources.</td><td> </td><td class="right">   authentication credentials for other resources.</td><td class="lineno" valign="top"></td></tr>
431      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
432      <tr bgcolor="gray" ><td></td><th><a name="part-l9" /><small>skipping to change at</small><em> page 14, line 18</em></th><th> </th><th><a name="part-r9" /><small>skipping to change at</small><em> page 13, line 49</em></th><td></td></tr>
433      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
434      <tr><td class="lineno" valign="top"></td><td class="left">   See Section 9 of [Part1] for the Acknowledgments related to this</td><td> </td><td class="right">   See Section 9 of [Part1] for the Acknowledgments related to this</td><td class="lineno" valign="top"></td></tr>
435      <tr><td class="lineno" valign="top"></td><td class="left">   document revision.</td><td> </td><td class="right">   document revision.</td><td class="lineno" valign="top"></td></tr>
436      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
437      <tr><td class="lineno" valign="top"></td><td class="left">8.  References</td><td> </td><td class="right">8.  References</td><td class="lineno" valign="top"></td></tr>
438      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
439      <tr><td class="lineno" valign="top"></td><td class="left">8.1.  Normative References</td><td> </td><td class="right">8.1.  Normative References</td><td class="lineno" valign="top"></td></tr>
440      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
441      <tr><td class="lineno" valign="top"></td><td class="left">   [Part1]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td> </td><td class="right">   [Part1]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td class="lineno" valign="top"></td></tr>
442      <tr><td class="lineno" valign="top"></td><td class="left">              Protocol (HTTP/1.1): Message Syntax and Routing",</td><td> </td><td class="right">              Protocol (HTTP/1.1): Message Syntax and Routing",</td><td class="lineno" valign="top"></td></tr>
443      <tr><td><a name="diff0026" /></td></tr>
444      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p1-messaging-21</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p1-messaging-22</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
445      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">October 2012.</span></td><td> </td><td class="rblock">              <span class="insert">February 2013.</span></td><td class="lineno" valign="top"></td></tr>
446      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
447      <tr><td class="lineno" valign="top"></td><td class="left">   [Part2]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td> </td><td class="right">   [Part2]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td class="lineno" valign="top"></td></tr>
448      <tr><td class="lineno" valign="top"></td><td class="left">              Protocol (HTTP/1.1): Semantics and Content",</td><td> </td><td class="right">              Protocol (HTTP/1.1): Semantics and Content",</td><td class="lineno" valign="top"></td></tr>
449      <tr><td><a name="diff0027" /></td></tr>
450      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p2-semantics-21</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p2-semantics-22</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
451      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">October 2012.</span></td><td> </td><td class="rblock">              <span class="insert">February 2013.</span></td><td class="lineno" valign="top"></td></tr>
452      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
453      <tr><td class="lineno" valign="top"></td><td class="left">   [Part6]    Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,</td><td> </td><td class="right">   [Part6]    Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,</td><td class="lineno" valign="top"></td></tr>
454      <tr><td class="lineno" valign="top"></td><td class="left">              Ed., "Hypertext Transfer Protocol (HTTP/1.1): Caching",</td><td> </td><td class="right">              Ed., "Hypertext Transfer Protocol (HTTP/1.1): Caching",</td><td class="lineno" valign="top"></td></tr>
455      <tr><td><a name="diff0028" /></td></tr>
456      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p6-cache-21</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p6-cache-22</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
457      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">October 2012.</span></td><td> </td><td class="rblock">              <span class="insert">February 2013.</span></td><td class="lineno" valign="top"></td></tr>
458      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
459      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate</td><td> </td><td class="right">   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate</td><td class="lineno" valign="top"></td></tr>
460      <tr><td class="lineno" valign="top"></td><td class="left">              Requirement Levels", BCP 14, RFC 2119, March 1997.</td><td> </td><td class="right">              Requirement Levels", BCP 14, RFC 2119, March 1997.</td><td class="lineno" valign="top"></td></tr>
461      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
462      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td> </td><td class="right">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td class="lineno" valign="top"></td></tr>
463      <tr><td class="lineno" valign="top"></td><td class="left">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td> </td><td class="right">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td class="lineno" valign="top"></td></tr>
464      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
465      <tr><td class="lineno" valign="top"></td><td class="left">8.2.  Informative References</td><td> </td><td class="right">8.2.  Informative References</td><td class="lineno" valign="top"></td></tr>
466      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
467      <tr><td><a name="diff0029" /></td></tr>
468      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">[BCP90]    Klyne, G., Nottingham, M., and J. Mogul, "Registration</span></td><td class="lineno" valign="top"></td></tr>
469      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">              Procedures for Message Header Fields", BCP 90, RFC 3864,</span></td><td class="lineno" valign="top"></td></tr>
470      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">              September 2004.</span></td><td class="lineno" valign="top"></td></tr>
471      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
472      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
473      <tr><td class="lineno" valign="top"></td><td class="left">              Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext</td><td> </td><td class="right">              Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext</td><td class="lineno" valign="top"></td></tr>
474      <tr><td class="lineno" valign="top"></td><td class="left">              Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.</td><td> </td><td class="right">              Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.</td><td class="lineno" valign="top"></td></tr>
475      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
476      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2617]  Franks, J., Hallam-Baker, P., Hostetler, J., Lawrence, S.,</td><td> </td><td class="right">   [RFC2617]  Franks, J., Hallam-Baker, P., Hostetler, J., Lawrence, S.,</td><td class="lineno" valign="top"></td></tr>
477      <tr><td class="lineno" valign="top"></td><td class="left">              Leach, P., Luotonen, A., and L. Stewart, "HTTP</td><td> </td><td class="right">              Leach, P., Luotonen, A., and L. Stewart, "HTTP</td><td class="lineno" valign="top"></td></tr>
478      <tr><td class="lineno" valign="top"></td><td class="left">              Authentication: Basic and Digest Access Authentication",</td><td> </td><td class="right">              Authentication: Basic and Digest Access Authentication",</td><td class="lineno" valign="top"></td></tr>
479      <tr><td class="lineno" valign="top"></td><td class="left">              RFC 2617, June 1999.</td><td> </td><td class="right">              RFC 2617, June 1999.</td><td class="lineno" valign="top"></td></tr>
480      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
481      <tr><td><a name="diff0030" /></td></tr>
482      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">[RFC3864]  Klyne, G., Nottingham, M., and J. Mogul, "Registration</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
483      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">              Procedures for Message Header Fields", BCP 90, RFC 3864,</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
484      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">              September 2004.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
485      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                                         </td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
486      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform</td><td> </td><td class="right">   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform</td><td class="lineno" valign="top"></td></tr>
487      <tr><td class="lineno" valign="top"></td><td class="left">              Resource Identifier (URI): Generic Syntax", STD 66,</td><td> </td><td class="right">              Resource Identifier (URI): Generic Syntax", STD 66,</td><td class="lineno" valign="top"></td></tr>
488      <tr><td class="lineno" valign="top"></td><td class="left">              RFC 3986, January 2005.</td><td> </td><td class="right">              RFC 3986, January 2005.</td><td class="lineno" valign="top"></td></tr>
489      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
490      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC4648]  Josefsson, S., "The Base16, Base32, and Base64 Data</td><td> </td><td class="right">   [RFC4648]  Josefsson, S., "The Base16, Base32, and Base64 Data</td><td class="lineno" valign="top"></td></tr>
491      <tr><td class="lineno" valign="top"></td><td class="left">              Encodings", RFC 4648, October 2006.</td><td> </td><td class="right">              Encodings", RFC 4648, October 2006.</td><td class="lineno" valign="top"></td></tr>
492      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
493      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an</td><td> </td><td class="right">   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an</td><td class="lineno" valign="top"></td></tr>
494      <tr><td class="lineno" valign="top"></td><td class="left">              IANA Considerations Section in RFCs", BCP 26, RFC 5226,</td><td> </td><td class="right">              IANA Considerations Section in RFCs", BCP 26, RFC 5226,</td><td class="lineno" valign="top"></td></tr>
495      <tr><td class="lineno" valign="top"></td><td class="left">              May 2008.</td><td> </td><td class="right">              May 2008.</td><td class="lineno" valign="top"></td></tr>
496      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
497      <tr><td class="lineno" valign="top"></td><td class="left">Appendix A.  Changes from RFCs 2616 and 2617</td><td> </td><td class="right">Appendix A.  Changes from RFCs 2616 and 2617</td><td class="lineno" valign="top"></td></tr>
498      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
499      <tr><td><a name="diff0031" /></td></tr>
500      <tr><td class="lineno" valign="top"></td><td class="lblock">   The "realm" parameter <span class="delete">isn't</span> required <span class="delete">anymore in general;</span></td><td> </td><td class="rblock">   The <span class="insert">framework for HTTP Authentication is now defined by this</span></td><td class="lineno" valign="top"></td></tr>
501      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   document, rather than RFC 2617.</span></td><td class="lineno" valign="top"></td></tr>
502      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
503      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The</span> "realm" parameter <span class="insert">is no longer always</span> required <span class="insert">on challenges;</span></td><td class="lineno" valign="top"></td></tr>
504      <tr><td class="lineno" valign="top"></td><td class="left">   consequently, the ABNF allows challenges without any auth parameters.</td><td> </td><td class="right">   consequently, the ABNF allows challenges without any auth parameters.</td><td class="lineno" valign="top"></td></tr>
505      <tr><td class="lineno" valign="top"></td><td class="left">   (Section 2)</td><td> </td><td class="right">   (Section 2)</td><td class="lineno" valign="top"></td></tr>
506      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
507      <tr><td class="lineno" valign="top"></td><td class="left">   The "token68" alternative to auth-param lists has been added for</td><td> </td><td class="right">   The "token68" alternative to auth-param lists has been added for</td><td class="lineno" valign="top"></td></tr>
508      <tr><td class="lineno" valign="top"></td><td class="left">   consistency with legacy authentication schemes such as "Basic".</td><td> </td><td class="right">   consistency with legacy authentication schemes such as "Basic".</td><td class="lineno" valign="top"></td></tr>
509      <tr><td class="lineno" valign="top"></td><td class="left">   (Section 2)</td><td> </td><td class="right">   (Section 2)</td><td class="lineno" valign="top"></td></tr>
510      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
511      <tr><td><a name="diff0032" /></td></tr>
512      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Introduce</span> Authentication Scheme <span class="delete">Registry.</span>  (Section 2.3)</td><td> </td><td class="rblock">   <span class="insert">This specification introduces the</span> Authentication Scheme <span class="insert">Registry,</span></td><td class="lineno" valign="top"></td></tr>
513      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   along with considerations for new authentication schemes.</span></td><td class="lineno" valign="top"></td></tr>
514      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   (Section 2.3)</td><td class="lineno" valign="top"></td></tr>
515      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
516      <tr><td class="lineno" valign="top"></td><td class="left">Appendix B.  Imported ABNF</td><td> </td><td class="right">Appendix B.  Imported ABNF</td><td class="lineno" valign="top"></td></tr>
517      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
518      <tr><td class="lineno" valign="top"></td><td class="left">   The following core rules are included by reference, as defined in</td><td> </td><td class="right">   The following core rules are included by reference, as defined in</td><td class="lineno" valign="top"></td></tr>
519      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix B.1 of [RFC5234]: ALPHA (letters), CR (carriage return),</td><td> </td><td class="right">   Appendix B.1 of [RFC5234]: ALPHA (letters), CR (carriage return),</td><td class="lineno" valign="top"></td></tr>
520      <tr><td class="lineno" valign="top"></td><td class="left">   CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double</td><td> </td><td class="right">   CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double</td><td class="lineno" valign="top"></td></tr>
521      <tr><td class="lineno" valign="top"></td><td class="left">   quote), HEXDIG (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any</td><td> </td><td class="right">   quote), HEXDIG (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any</td><td class="lineno" valign="top"></td></tr>
522      <tr><td class="lineno" valign="top"></td><td class="left">   8-bit sequence of data), SP (space), and VCHAR (any visible US-ASCII</td><td> </td><td class="right">   8-bit sequence of data), SP (space), and VCHAR (any visible US-ASCII</td><td class="lineno" valign="top"></td></tr>
523      <tr><td class="lineno" valign="top"></td><td class="left">   character).</td><td> </td><td class="right">   character).</td><td class="lineno" valign="top"></td></tr>
524      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
525      <tr><td class="lineno" valign="top"></td><td class="left">   The rules below are defined in [Part1]:</td><td> </td><td class="right">   The rules below are defined in [Part1]:</td><td class="lineno" valign="top"></td></tr>
526      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
527      <tr><td><a name="diff0033" /></td></tr>
528      <tr><td class="lineno" valign="top"></td><td class="lblock">     BWS           = &lt;BWS, defined in [Part1], Section <span class="delete">3.2.1&gt;</span></td><td> </td><td class="rblock">     BWS           = &lt;BWS, defined in [Part1], Section <span class="insert">3.2.3&gt;</span></td><td class="lineno" valign="top"></td></tr>
529      <tr><td class="lineno" valign="top"></td><td class="lblock">     OWS           = &lt;OWS, defined in [Part1], Section <span class="delete">3.2.1&gt;</span></td><td> </td><td class="rblock">     OWS           = &lt;OWS, defined in [Part1], Section <span class="insert">3.2.3&gt;</span></td><td class="lineno" valign="top"></td></tr>
530      <tr><td class="lineno" valign="top"></td><td class="lblock">     quoted-string = &lt;quoted-string, defined in [Part1], Section <span class="delete">3.2.4&gt;</span></td><td> </td><td class="rblock">     quoted-string = &lt;quoted-string, defined in [Part1], Section <span class="insert">3.2.6&gt;</span></td><td class="lineno" valign="top"></td></tr>
531      <tr><td class="lineno" valign="top"></td><td class="lblock">     token         = &lt;token, defined in [Part1], Section <span class="delete">3.2.4&gt;</span></td><td> </td><td class="rblock">     token         = &lt;token, defined in [Part1], Section <span class="insert">3.2.6&gt;</span></td><td class="lineno" valign="top"></td></tr>
532      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
533      <tr><td class="lineno" valign="top"></td><td class="left">Appendix C.  Collected ABNF</td><td> </td><td class="right">Appendix C.  Collected ABNF</td><td class="lineno" valign="top"></td></tr>
534      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
535      <tr><td class="lineno" valign="top"></td><td class="left">   Authorization = credentials</td><td> </td><td class="right">   Authorization = credentials</td><td class="lineno" valign="top"></td></tr>
536      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
537      <tr><td><a name="diff0034" /></td></tr>
538      <tr><td class="lineno" valign="top"></td><td class="lblock">   BWS = &lt;BWS, defined in [Part1], Section 3.2.<span class="delete">1</span>&gt;</td><td> </td><td class="rblock">   BWS = &lt;BWS, defined in [Part1], Section 3.2.<span class="insert">3</span>&gt;</td><td class="lineno" valign="top"></td></tr>
539      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
540      <tr><td><a name="diff0035" /></td></tr>
541      <tr><td class="lineno" valign="top"></td><td class="lblock">   OWS = &lt;OWS, defined in [Part1], Section 3.2.<span class="delete">1</span>&gt;</td><td> </td><td class="rblock">   OWS = &lt;OWS, defined in [Part1], Section 3.2.<span class="insert">3</span>&gt;</td><td class="lineno" valign="top"></td></tr>
542      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
543      <tr><td class="lineno" valign="top"></td><td class="left">   Proxy-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS</td><td> </td><td class="right">   Proxy-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS</td><td class="lineno" valign="top"></td></tr>
544      <tr><td class="lineno" valign="top"></td><td class="left">    challenge ] )</td><td> </td><td class="right">    challenge ] )</td><td class="lineno" valign="top"></td></tr>
545      <tr><td class="lineno" valign="top"></td><td class="left">   Proxy-Authorization = credentials</td><td> </td><td class="right">   Proxy-Authorization = credentials</td><td class="lineno" valign="top"></td></tr>
546      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
547      <tr><td class="lineno" valign="top"></td><td class="left">   WWW-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS challenge</td><td> </td><td class="right">   WWW-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS challenge</td><td class="lineno" valign="top"></td></tr>
548      <tr><td class="lineno" valign="top"></td><td class="left">    ] )</td><td> </td><td class="right">    ] )</td><td class="lineno" valign="top"></td></tr>
549      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
550      <tr><td class="lineno" valign="top"></td><td class="left">   auth-param = token BWS "=" BWS ( token / quoted-string )</td><td> </td><td class="right">   auth-param = token BWS "=" BWS ( token / quoted-string )</td><td class="lineno" valign="top"></td></tr>
551      <tr><td class="lineno" valign="top"></td><td class="left">   auth-scheme = token</td><td> </td><td class="right">   auth-scheme = token</td><td class="lineno" valign="top"></td></tr>
552      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
553      <tr><td class="lineno" valign="top"></td><td class="left">   challenge = auth-scheme [ 1*SP ( token68 / [ ( "," / auth-param ) *(</td><td> </td><td class="right">   challenge = auth-scheme [ 1*SP ( token68 / [ ( "," / auth-param ) *(</td><td class="lineno" valign="top"></td></tr>
554      <tr><td class="lineno" valign="top"></td><td class="left">    OWS "," [ OWS auth-param ] ) ] ) ]</td><td> </td><td class="right">    OWS "," [ OWS auth-param ] ) ] ) ]</td><td class="lineno" valign="top"></td></tr>
555      <tr><td class="lineno" valign="top"></td><td class="left">   credentials = auth-scheme [ 1*SP ( token68 / [ ( "," / auth-param )</td><td> </td><td class="right">   credentials = auth-scheme [ 1*SP ( token68 / [ ( "," / auth-param )</td><td class="lineno" valign="top"></td></tr>
556      <tr><td class="lineno" valign="top"></td><td class="left">    *( OWS "," [ OWS auth-param ] ) ] ) ]</td><td> </td><td class="right">    *( OWS "," [ OWS auth-param ] ) ] ) ]</td><td class="lineno" valign="top"></td></tr>
557      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
558      <tr><td><a name="diff0036" /></td></tr>
559      <tr><td class="lineno" valign="top"></td><td class="lblock">   quoted-string = &lt;quoted-string, defined in [Part1], Section 3.2.<span class="delete">4</span>&gt;</td><td> </td><td class="rblock">   quoted-string = &lt;quoted-string, defined in [Part1], Section 3.2.<span class="insert">6</span>&gt;</td><td class="lineno" valign="top"></td></tr>
560      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
561      <tr><td><a name="diff0037" /></td></tr>
562      <tr><td class="lineno" valign="top"></td><td class="lblock">   token = &lt;token, defined in [Part1], Section 3.2.<span class="delete">4</span>&gt;</td><td> </td><td class="rblock">   token = &lt;token, defined in [Part1], Section 3.2.<span class="insert">6</span>&gt;</td><td class="lineno" valign="top"></td></tr>
563      <tr><td class="lineno" valign="top"></td><td class="left">   token68 = 1*( ALPHA / DIGIT / "-" / "." / "_" / "~" / "+" / "/" )</td><td> </td><td class="right">   token68 = 1*( ALPHA / DIGIT / "-" / "." / "_" / "~" / "+" / "/" )</td><td class="lineno" valign="top"></td></tr>
564      <tr><td class="lineno" valign="top"></td><td class="left">    *"="</td><td> </td><td class="right">    *"="</td><td class="lineno" valign="top"></td></tr>
565      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
566      <tr><td class="lineno" valign="top"></td><td class="left">Appendix D.  Change Log (to be removed by RFC Editor before publication)</td><td> </td><td class="right">Appendix D.  Change Log (to be removed by RFC Editor before publication)</td><td class="lineno" valign="top"></td></tr>
567      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
568      <tr><td class="lineno" valign="top"></td><td class="left">   Changes up to the first Working Group Last Call draft are summarized</td><td> </td><td class="right">   Changes up to the first Working Group Last Call draft are summarized</td><td class="lineno" valign="top"></td></tr>
569      <tr><td class="lineno" valign="top"></td><td class="left">   in &lt;http://trac.tools.ietf.org/html/</td><td> </td><td class="right">   in &lt;http://trac.tools.ietf.org/html/</td><td class="lineno" valign="top"></td></tr>
570      <tr><td class="lineno" valign="top"></td><td class="left">   draft-ietf-httpbis-p7-auth-19#appendix-C&gt;.</td><td> </td><td class="right">   draft-ietf-httpbis-p7-auth-19#appendix-C&gt;.</td><td class="lineno" valign="top"></td></tr>
571      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
572      <tr><td class="lineno" valign="top"></td><td class="left">D.1.  Since draft-ietf-httpbis-p7-auth-19</td><td> </td><td class="right">D.1.  Since draft-ietf-httpbis-p7-auth-19</td><td class="lineno" valign="top"></td></tr>
573      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
574      <tr bgcolor="gray" ><td></td><th><a name="part-l10" /><small>skipping to change at</small><em> page 17, line 23</em></th><th> </th><th><a name="part-r10" /><small>skipping to change at</small><em> page 17, line 23</em></th><td></td></tr>
575      <tr><td class="lineno" valign="top"></td><td class="left">   Closed issues:</td><td> </td><td class="right">   Closed issues:</td><td class="lineno" valign="top"></td></tr>
576      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
577      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/376&gt;: "rename</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/376&gt;: "rename</td><td class="lineno" valign="top"></td></tr>
578      <tr><td class="lineno" valign="top"></td><td class="left">      b64token for clarity"</td><td> </td><td class="right">      b64token for clarity"</td><td class="lineno" valign="top"></td></tr>
579      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
580      <tr><td class="lineno" valign="top"></td><td class="left">   Other changes:</td><td> </td><td class="right">   Other changes:</td><td class="lineno" valign="top"></td></tr>
581      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
582      <tr><td class="lineno" valign="top"></td><td class="left">   o  Conformance criteria and considerations regarding error handling</td><td> </td><td class="right">   o  Conformance criteria and considerations regarding error handling</td><td class="lineno" valign="top"></td></tr>
583      <tr><td class="lineno" valign="top"></td><td class="left">      are now defined in Part 1.</td><td> </td><td class="right">      are now defined in Part 1.</td><td class="lineno" valign="top"></td></tr>
584      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
585      <tr><td><a name="diff0038" /></td></tr>
586      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">D.3.  Since draft-ietf-httpbis-p7-auth-21</span></td><td class="lineno" valign="top"></td></tr>
587      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
588      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Closed issues:</span></td><td class="lineno" valign="top"></td></tr>
589      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
590      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/403&gt;:</span></td><td class="lineno" valign="top"></td></tr>
591      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      "Authentication and caching - max-age"</span></td><td class="lineno" valign="top"></td></tr>
592      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
593      <tr><td class="lineno" valign="top"></td><td class="left">Index</td><td> </td><td class="right">Index</td><td class="lineno" valign="top"></td></tr>
594      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
595      <tr><td class="lineno" valign="top"></td><td class="left">   4</td><td> </td><td class="right">   4</td><td class="lineno" valign="top"></td></tr>
596      <tr><td class="lineno" valign="top"></td><td class="left">      401 Unauthorized (status code)  9</td><td> </td><td class="right">      401 Unauthorized (status code)  9</td><td class="lineno" valign="top"></td></tr>
597      <tr><td class="lineno" valign="top"></td><td class="left">      407 Proxy Authentication Required (status code)  9</td><td> </td><td class="right">      407 Proxy Authentication Required (status code)  9</td><td class="lineno" valign="top"></td></tr>
598      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
599      <tr><td class="lineno" valign="top"></td><td class="left">   A</td><td> </td><td class="right">   A</td><td class="lineno" valign="top"></td></tr>
600      <tr><td class="lineno" valign="top"></td><td class="left">      Authorization header field  9</td><td> </td><td class="right">      Authorization header field  9</td><td class="lineno" valign="top"></td></tr>
601      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
602      <tr><td class="lineno" valign="top"></td><td class="left">   C</td><td> </td><td class="right">   C</td><td class="lineno" valign="top"></td></tr>
603      <tr><td class="lineno" valign="top"></td><td class="left">      Canonical Root URI  6</td><td> </td><td class="right">      Canonical Root URI  6</td><td class="lineno" valign="top"></td></tr>
604      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
605      <tr><td class="lineno" valign="top"></td><td class="left">   G</td><td> </td><td class="right">   G</td><td class="lineno" valign="top"></td></tr>
606      <tr><td class="lineno" valign="top"></td><td class="left">      Grammar</td><td> </td><td class="right">      Grammar</td><td class="lineno" valign="top"></td></tr>
607      <tr><td class="lineno" valign="top"></td><td class="left">         auth-param  5</td><td> </td><td class="right">         auth-param  5</td><td class="lineno" valign="top"></td></tr>
608      <tr><td class="lineno" valign="top"></td><td class="left">         auth-scheme  5</td><td> </td><td class="right">         auth-scheme  5</td><td class="lineno" valign="top"></td></tr>
609      <tr><td class="lineno" valign="top"></td><td class="left">         Authorization  9</td><td> </td><td class="right">         Authorization  9</td><td class="lineno" valign="top"></td></tr>
610      <tr><td class="lineno" valign="top"></td><td class="left">         challenge  5</td><td> </td><td class="right">         challenge  5</td><td class="lineno" valign="top"></td></tr>
611      <tr><td class="lineno" valign="top"></td><td class="left">         credentials  6</td><td> </td><td class="right">         credentials  6</td><td class="lineno" valign="top"></td></tr>
612      <tr><td class="lineno" valign="top"></td><td class="left">         Proxy-Authenticate  10</td><td> </td><td class="right">         Proxy-Authenticate  10</td><td class="lineno" valign="top"></td></tr>
613      <tr><td><a name="diff0039" /></td></tr>
614      <tr><td class="lineno" valign="top"></td><td class="lblock">         Proxy-Authorization  1<span class="delete">1</span></td><td> </td><td class="rblock">         Proxy-Authorization  1<span class="insert">0</span></td><td class="lineno" valign="top"></td></tr>
615      <tr><td class="lineno" valign="top"></td><td class="left">         token68  5</td><td> </td><td class="right">         token68  5</td><td class="lineno" valign="top"></td></tr>
616      <tr><td class="lineno" valign="top"></td><td class="left">         WWW-Authenticate  11</td><td> </td><td class="right">         WWW-Authenticate  11</td><td class="lineno" valign="top"></td></tr>
617      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
618      <tr><td class="lineno" valign="top"></td><td class="left">   P</td><td> </td><td class="right">   P</td><td class="lineno" valign="top"></td></tr>
619      <tr><td class="lineno" valign="top"></td><td class="left">      Protection Space  6</td><td> </td><td class="right">      Protection Space  6</td><td class="lineno" valign="top"></td></tr>
620      <tr><td class="lineno" valign="top"></td><td class="left">      Proxy-Authenticate header field  10</td><td> </td><td class="right">      Proxy-Authenticate header field  10</td><td class="lineno" valign="top"></td></tr>
621      <tr><td class="lineno" valign="top"></td><td class="left">      Proxy-Authorization header field  10</td><td> </td><td class="right">      Proxy-Authorization header field  10</td><td class="lineno" valign="top"></td></tr>
622      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
623      <tr><td class="lineno" valign="top"></td><td class="left">   R</td><td> </td><td class="right">   R</td><td class="lineno" valign="top"></td></tr>
624      <tr><td class="lineno" valign="top"></td><td class="left">      Realm  6</td><td> </td><td class="right">      Realm  6</td><td class="lineno" valign="top"></td></tr>
625      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
626      <tr><td class="lineno" valign="top"></td><td class="left">   W</td><td> </td><td class="right">   W</td><td class="lineno" valign="top"></td></tr>
627      <tr><td><a name="diff0040" /></td></tr>
628      <tr><td class="lineno" valign="top"></td><td class="lblock">      WWW-Authenticate header field  1<span class="delete">1</span></td><td> </td><td class="rblock">      WWW-Authenticate header field  1<span class="insert">0</span></td><td class="lineno" valign="top"></td></tr>
629      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
630      <tr><td class="lineno" valign="top"></td><td class="left">Authors' Addresses</td><td> </td><td class="right">Authors' Addresses</td><td class="lineno" valign="top"></td></tr>
631      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
632      <tr><td class="lineno" valign="top"></td><td class="left">   Roy T. Fielding (editor)</td><td> </td><td class="right">   Roy T. Fielding (editor)</td><td class="lineno" valign="top"></td></tr>
633      <tr><td class="lineno" valign="top"></td><td class="left">   Adobe Systems Incorporated</td><td> </td><td class="right">   Adobe Systems Incorporated</td><td class="lineno" valign="top"></td></tr>
634      <tr><td class="lineno" valign="top"></td><td class="left">   345 Park Ave</td><td> </td><td class="right">   345 Park Ave</td><td class="lineno" valign="top"></td></tr>
635      <tr><td class="lineno" valign="top"></td><td class="left">   San Jose, CA  95110</td><td> </td><td class="right">   San Jose, CA  95110</td><td class="lineno" valign="top"></td></tr>
636      <tr><td class="lineno" valign="top"></td><td class="left">   USA</td><td> </td><td class="right">   USA</td><td class="lineno" valign="top"></td></tr>
637      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
638      <tr><td class="lineno" valign="top"></td><td class="left">   EMail: fielding@gbiv.com</td><td> </td><td class="right">   EMail: fielding@gbiv.com</td><td class="lineno" valign="top"></td></tr>
639
640     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
641     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 40 change blocks.&nbsp;</a></th></tr>
642     <tr class="stats"><td></td><th><i>104 lines changed or deleted</i></th><th><i> </i></th><th><i>97 lines changed or added</i></th><td></td></tr>
643     <tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.38. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
644   </table>
645   </body>
646   </html>
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